smith



V2 Sheets-Sheet 1.

Patented. Feb. 1,1870.

SMITH, t Dryer.

Frui

N.FEYERS, FHQTO-LrTHQGRAPMER. WASHINGTQN. n.6A

2 Sheets-Sheet` 2.

M. P. SMITH.

Fruit Dryer. No. 99,488. Patented Feb. 1,1870.

ilnitrd' tatra MARSHALL I. SMITH, `OF BALTIMORE, MARYLAND.

Letters Patent No. 99,488, dated February 1, 1870.

DRIER.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it 'may concern Be it known that I, MARSHALL P.. SMITH, of the city and count-y of Baltimore, and State of Maryland,-

have invented certain Improvements in Apparatus for Drying Lumber, Bricks, Vegetables, Fruit,'and other substances,l of which the following is a specification.

The first part of my invention relates to the form and construction of` theovens or chambers iu which the articles to be dried are placed.

The second part of my invention relates to the employment of a blast of hot air, introduced under pressure, in place of thenatural draught of a chimney, as has heretofore been the plan indriers of this particular kind. y

The third part of my invention relates to the manner of exhausting the moisture thrown o by the drying-substances.

Figure l is a perspective view of an oven, embodying my invention Figure 2 is a plan of the same.

line c d of fig. 3.

Figure 5 represents a perspective View of my device,

y with' the fan-blower and furnace attached.

Similar letters refer to similar parts. y A A is a rectangular oven or chamber, constructed of brick or any suitable material. Studding, lathed and plastered inside and out, will answer every purpose, it being,r only required that it be as air-tight as it can be made.

'Ihe dimensions yary with the article to be dried l and the quantity required. For lumber, I prefer it eight (VS) feet wide, six (6) feet high, and fifty (50) to eighty (80) feet long. At cit-her end are doors B B.

Runninglongitudinally beneath the floor, is a clay or iron pipe, C G, having outlets D D opening into the chamber, provided with valves d d', for the regnlat-ion of the hot air.

This pipe leads to a furnace, Y, in which the air is heated, and thence to a fan or blowing-engine, X, which creates the blast. By means of this pipe and its outlet, the temperature of every part of the chamy ber is completely under control, and can he varied as required.

.At one end of the chamber'is another larger pipe, E, leading to the open air.

Through the centre of this` pipe is a second much smaller pipe, e, about half'an inch in diameter, leading to the boiler, the steam from which, blowing into and throufh the -lareer ile createsa vacuum and causes all the moisture and vapor eliminated from the drying-substances to be rapidly exhausted from the chamber.

What I claim as my invent-ion, and desire t-o secure by Letters Patent, is

l.. A drying-chamber or oven, constructed with pipes for the admission of hot air and for the removal ofthe vapor, in the manner and for the purposes substantially as described.

2. In combination wit-h the sl1biectmatter of the foregoing, the application of the fan-blower, in the manner and for the purposes shown.

MARSHALL I. SMITH. l

Witnesses:

WM. H. Amun, M. K. AIKE'X. 

